Pls help I’m stuck on this part

Answer:

it will expand.

Explanation:

The expansion of water when you cool it to lower temperatures is unusual, since most liquids contract when they're cooled.

Answer:

what do u need help with

Explanation:

I can help uu

Answer:

2

Explanation:

B has a configuration as 2,3    so when it becomes + 3 that means it has given out its 3 electrons to be stable so it becomes 2

Answer:

i think it was lll,lV ㄸㄸㅇㅊㅎㅍㅋ

Answer:

false

salt water does the oppsotie

Explanation:

Answer:

A, C, and D

Explanation:

The correct options that apply to the principal conservation of energy are A, C, and D.

A is correct because energy can neither be created nor destroyed. However, energy can be transfered from one location to another or be converted from one form to another. Whether transferred to converted, the magnitude remains the same.

C is correct because energy cannot be destroyed but can be transferred or converted. Hence, if a body or a location loses temprature, then the loss is being gained by another body or location.

D is also correct. A closed system is a system that does not exchange matter with its surroundings. Hence, the total energy remains the same within the system.

Answer:

The total energy in a closed system such as Earth stays the same.

Explanation:

The simplest statement of the law of conservation of energy is that energy can neither be created nor destroyed but can be converted from one form to another.

A typical illustration of this principle of conservation of energy is a closed system of which our universe is an important example.

The total amount of energy in the universe is always a constant. Energy lost in one part must be equal to the energy gained on the other part.

Answer:

i believe it's A-atomic mass

Explanation:

hope this helps u, sorry if it doesn't.

Answer:

The periodic table is organized by atomic number.  If you look closely, the atomic number is usually at the top of the element square.  It goes in counting order horizontally.

Hope this helps :)

Answer:

YoungBoy Never Broke Again. Explanation: He is the goat

Answer:

Consequently, what happens when gas obtained by heating slaked lime and ammonium chloride is passed through copper sulphate solution? The HCl in the gas mixture will form hydrochloric and the H+ will react with some of the NH3(aq), forming NH4^+, and with some of the SO4^2-, forming HSO4^-.

The gas obtained by heating Ammonium Chloride and slaked lime is passed through copper sulphate, deep blue solution will be formed.

The gas obtained by heating Ammonium Chloride and slaked lime is ammonia gas.

2NH₄Cl + Ca(OH)₂  ---> CaCl₂ + 2NH₃ + 2H₂O

Ammonia reacts with copper (II) ions to precipitate light blue copper hydroxide.

Ammonia causes the copper ion to go back into the solution as a deep blue ammonia complex.

However, in excess ammonia, the precipitate dissolves.

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Answer:

C.A list of metals arranged in order of reactivity

The activity series of the metal is the orderly arrangement of the metals based on the reactivities that show the power of one metal to displace another in a reaction. Thus, option C is correct.

A reactivity series is the arrangement of the metals that shows the analytical progression and the decreasing order of the reactivity. The reactivity series is also called the activity series.

The chart depicts the vigorous nature of the metal that allows them to displace another in a displacement reaction. The reactivity is based on the element that loses its electron more easily.

The reactivity series is based on the element's ability to displace the hydrogen from the acidic solutions and hence, makes them more reactive than the others.

Therefore, the activity series depicts the reactivity.

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Answer:

A is your answer.

Explanation:

This law states that, despite chemical reactions or physical transformations, mass is conserved — that is, it cannot be created or destroyed — within an isolated system. In other words, in a chemical reaction, the mass of the products will always be equal to the mass of the reactants.

A substance's molar mass is the mass in grams of one mole of the compound. A mole is the number of entities present in a substance, such as atoms, molecules, or ions. A mole of any substance is defined as 6.022  × 10²³  molecules.

0.578 moles of water contains 3.45 × 10²³  molecules.

1 mole contains 6.022 × 10²³ molecules

0.578 moles of water contains 0.578 ×  6.02  × 10²³ molecules

= 3.45 × 10²³ molecules.

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Answer:

c) disaccharides have more chemical bonds

Explanation:

disaccharides are made from the condensation of two monosaccharides.

This means there are more bonds in disaccharides. More bonds mean greater energy and vice versa .

Answer:

Explanation:

The new volume can be found by using the formula for Boyle's law which is

[tex]P_1V_1 = P_2V_2[/tex]

where

P1 is the initial pressure

P2 is the final pressure

V1 is the initial volume

V2 is the final volume

Since we are finding the new volume

[tex]V_2 = \frac{P_1V_1}{P_2} \\[/tex]

So we have

[tex]V_2 = \frac{500000 \times 200}{250000} = \frac{100000000}{250000} = \frac{10000}{25} \\ [/tex]

We have the final answer as

Hope this helps you

Answer:

That is Tungsten .

Explanation:

Answer:

3.4g

Explanation:

Given parameters:

Mass of ethanol  = 2.911g

Unknown:

Mass of water vapor = ?

Solution:

To solve this problem, let us write the balanced reaction equation first;

             C₂H₅OH  + 3O₂  → 2CO₂  + 3H₂O

Now find the number of moles of ethanol;

  Number of moles  = [tex]\frac{mass}{molar mass}[/tex]

    Molar mass of ethanol = 2(12) + 5(1) + 16 + 1 = 46g/mol

  Number of moles  = [tex]\frac{2.911}{46}[/tex]   = 0.06mole

  So;

       1 mole of ethanol will produce 3 moles of water vapor

      0.06mole of ethanol will produce 0.06 x 3  = 0.19moles of water vapor

 Mass of water vapor  = number of moles x molar mass

   Molar mass of H₂O  = 2(1) + 16  = 18g/mol

  Mass of water vapor  = 0.19 x 18  = 3.4g

Answer:

Combination or synthesis reaction

Explanation:

The reaction is a combination or synthesis reaction.

Let us write the reaction equation:

         CO + H₂O →  H₂CO₃

A combination or synthesis reaction is one in which a single product forms from two or more reactants. The formation of a compounds from the union of their constituent elements falls into this category of reaction.

A group of cells doing the same job forms a tissue. A group of tissues working together forms an organ. Organs work in groups, too. A group of organs doing the same job is called a system.

hope this helps

Answer:

D

Explanation:

Answer:

put them 205 centimeters apart

Explanation: i just know

Answer:

1 Meter is equal to 100 centimeters

Determine the ratio to use 100cm/1m

Multiply the given value by the ratio: 0.2m * 100cm/1m

Tanya should plant the saplings 20 centimeters apart

Explanation:

Answer:

Chemical nomenclature

Answer:

0.924 g

Explanation:

The following data were obtained from the question:

Volume of CO2 at RTP = 0.50 dm³

Mass of CO2 =?

Next, we shall determine the number of mole of CO2 that occupied 0.50 dm³ at RTP (room temperature and pressure). This can be obtained as follow:

1 mole of gas = 24 dm³ at RTP

Thus,

1 mole of CO2 occupies 24 dm³ at RTP.

Therefore, Xmol of CO2 will occupy 0.50 dm³ at RTP i.e

Xmol of CO2 = 0.5 /24

Xmol of CO2 = 0.021 mole

Thus, 0.021 mole of CO2 occupied 0.5 dm³ at RTP.

Finally, we shall determine the mass of CO2 as follow:

Mole of CO2 = 0.021 mole

Molar mass of CO2 = 12 + (2×16) = 13 + 32 = 44 g/mol

Mass of CO2 =?

Mole = mass /Molar mass

0.021 = mass of CO2 /44

Cross multiply

Mass of CO2 = 0.021 × 44

Mass of CO2 = 0.924 g.

Answer:

They have to be decreased to a lower kinetic energy by lowering the temperature

Explanation:

Solute affects the freezing point of a solvent because, When a substance starts to freeze, the molecules slow down due to the decreases in temperature, and the intermolecular forces start to take over. Therefore, they have to be decreased to a lower kinetic energy by lowering the temperature

The empirical formula for calcium bromide has been [tex]\rm CaBr_2[/tex].

The empirical formula has been given with the simplest whole number ratio of the chemical formula.

The moles of calcium in calcium bromide has been:

[tex]moles=\dfrac{mass}{mwt}[/tex]

[tex]moles_C_a=\dfrac{0.2}{40} \\moles_C_a=0.005[/tex]

The moles of bromine in calcium bromide has been:

[tex]moles_B_r=\dfrac{0.8}{80} \\moles_B_r=0.01[/tex]

The simplest whole number ratio for Br and Ca has been given by dividing moles of Ca and Br with moles of Ca.

[tex]\rm Ca=\dfrac{0.005}{0.005} \\Ca=1[/tex]

[tex]\rm Br=\dfrac{0.01}{0.005} \\Br=2[/tex]

From the whole numbers, the empirical formula for calcium bromide has been [tex]\rm CaBr_2[/tex].

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Answer:

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Answer:

mixture of a material made up of two or more different substances, which are mixed but not combined chemically are retained